What is an Iterator ?

Question

I don't know what an iterator is in Java.

Answer 1

• If you have a Collection in JAVA and you want to go through the elements of it, step-by-step, you use an iterator.
• These let you process each element of a Collection. 
• The arrangment of the elements of the Collection is irrelevant to the iterating manner of the iterator. 
• Iterators are implemented differently for every Collection. 

        

If you want to learn the hands-on of how to operate an iterator, you should look up a java tutorial for the same. That will make your concepts more clear.